National Cooperative Highway Research Program 3-66, has developed a real-time traffic signal State Transition Logic Software. This logic allows local intersection control programs to be aware of the distinctions between different kinds of preempts and the meanings (e.g., the difference between railroad and light rail preempts, fire trucks, ambulances, police, and mass transit vehicle priority requests). This project will develop versions of the National Cooperative Highway Research Program 3-66 logic in C and Ada programming languages to ride to work with Path traffic signal control program logic and the real-time Linux Advanced Transportation Controller operating system for the Advanced Transportation Controller. Objectives of this research study are to: (1) Examine the state of the art in open source traffic signal controller logic. (2) Convert the Path Logic to run on the prototype development hardware. (3) Develop interactions with traffic simulator for extended testing. (4) Integrate selected elements of the National Cooperative Highway Research Program 3-66 signal state transition logic.

Goals:

The key project objective is to develop a logic for signal state transitions that follows in the footsteps of the National Cooperative Highway Research Program (NCHRP) 3-66.

Background Information:

They were able to test SCOPE at a live intersection in Orlando, Florida. They were supported by the Orange County Traffic Division. The final report's last section contains photos and information about the testing. In recap, this is the first time SCOPE ever ran with a malfunction management unit (MMU) in the cabinet. The MMU detected two minor problems that were easily resolved. No phase conflicts were detected. The test was a success with live traffic flowing through the intersection.

U.S. Department of Transportation: Research and Innovative Technology Administration (RITA); Role(s): Other stakeholder

Expected Benefits:

The expected benefit of this study is improved signal state transition algorithms that provide the opportunity for utilizing enhanced traffic and pedestrian sensor data for optimization of both vehicular and pedestrian safety and operations.

Project Findings:

It is possible to develop a software that does signal state transitions in the footsteps of the National Cooperative Highway Research Program (NCHRP) 3-66.